Question 48
Answer True/False.
In the equation 7k - 7 = 7, the variable is 7.
False.
A variable is a letter that represents an unknown quantity which can take any value.
Given equation is 7k - 7 = 7.
Here, the variable is k.
Question 55
State whether the statement is True or False.
If 9 is the solution of variable x in the equation 5x−72=y,then the value of y is 28.
Question 78
In the following question, state whether the given statements are true (T) or false (F).
(−7)−4×(−7)2=(−7)−2